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United States Patent | 5,340,233 |
Motl | August 23, 1994 |
A pneumatically operated percussion apparatus for compacting soil, or other material. The apparatus includes a gear case that supports a percussion unit that is adapted to engage the soil to compact the same. A pneumatically operated motor is mounted on the gear case and air is supplied to the motor via a manually-operated "deadman" valve unit. A centrifugal clutch connects the output shaft of the motor to the percussion unit. The air flow to the motor is controlled by a governor to obtain a substantially uniform rotational speed for the motor output shaft.
Inventors: | Motl; Robert M. (West Bend, WI) |
Assignee: | M-B-W Inc. (Slinger, WI) |
Appl. No.: | 957729 |
Filed: | October 7, 1992 |
Current U.S. Class: | 404/133.05; 104/14; 404/133.1 |
Intern'l Class: | E01C 019/34 |
Field of Search: | 404/133.05,133.1,133.2 173/90,117,121,122,201,205 104/10,14 |
3277801 | Oct., 1966 | Horvath et al. | 404/133. |
3552410 | Jan., 1971 | Amtsberg | 137/56. |
3630127 | Dec., 1971 | Yamato | 404/133. |
3964182 | Jun., 1976 | Pomeret et al. | 37/1. |
4156576 | May., 1979 | Clavel et al. | 404/133. |
4186197 | Jan., 1980 | Tetsuo | 404/133. |
4557336 | Dec., 1985 | DeNise | 404/133. |
4850437 | Jul., 1989 | Sudnishnikov et al. | 173/90. |
"An Impact Compactor For Every Job", Racine Hydraulics: Machinery, Inc., Racine, Wis. (1963). "Air Motor", Atlas Copco Tools Inc., Farmington Hills, Mich. "Ground Pounder". M-B-W, Slinger, Wis. |